Pressure reducing and regulating valve



May 7, 1929. B, F, AINES 1,711,999

PRESSURE REDUCING AND REGULATING VALVE Filed 001;. 11, 1926 INVENTOR.

Patented Ma 7, 192 9.

BENJAMIN FRANKLIN GAINES, OF GAINESVILLE,v FLORIDA.

PRESSURE REDUCING AND REGULATING VALVE.

Application filed October 11, 1926. Serial No. 140,866.

This invention is a novel improvement in pressure reducing andregulating valves,

and the principal object thereof is to provide a simple and efiicientreducing and regulating valvefor steam, water, or gas pipes,

said valve maintaining a discharge pressure depending upon andcorresponding with the supply pressure, the discharge pressure bearing apredetermined ratio .thereto, thereby enabling the operator to controlor vary the discharge pressure by merely controlling or varying thesupply pressure. 1 I i Other objects of inventionwill be hereinafter setfort e I will explain the invention with reference to the accompanyingdrawing which illustrates one practical embodiment thereof to enableothers familiar with the art to adopt and use the same, and willsummarize in: the claims the novel features of construction, and thenovel combination of parts, for which protection'is desired. j Thedrawing shows a section through the valveand the adjacent portions forthe supply and discharge pipes.

As shown in the drawings, the valve comprises a body 1 having 'an. inletopening 1 and a diametrically opposed discharge opening 1 which may beconnected by flange couplings in the usual manner with the supply anddischarge pipes, S and D, respectivel W Within the body is a doublevalve seat 1,

1, :fior the double valve 2 2F, mounted on a stem 2 which passesdownwardly through the body 1 and into atwo column frame 3, bolted orotherwise secured to the lower end of body 1, as shown. Frame 3 isprovided 40 with an opening 3 in column 3", into which extends a lever 4having its inner end pivoted as at 4 to a lug on column 3 opposite theopening 3. Lever 4 is also pivoted, as at 4", to the valve stem 2,whereby as the lever 4 is rocked the double valve 2*, 2" will open orclose against the double valve seat 1,'1 of the body, to establish orclose communication between the supply pipe S and the interior of thebody 1.

The discharge pipe D is preferably similarly connected with the outlet 1of the body 1 by a suitable flange coupling, in the usual manner, saiddischarge pipe D bein preferably disposed diametrically opposlte thesupply pi e S. o

The va ve stem 2 extends down beyond the lever 4 and has its outer endconnected with a diaphragm 5 mounted in a diaphragm casing .5 integralwith or connected to the casing of chamber 3 whereby as the diaphragm5is actuated the lever 4 will likewise be rocked. The portion of thediaphragm casing 5 below the diaphragm 5 is connected b a pipe 5 withthe'discharge pipe D beyon the body 1, whereby the'pressure below thediaphragm 5 will correspond with the actual pressure in the dischargepipe D.

Connectedwith the body 1 diametrically opposite the frame 3, is a frame6 somewhat similar to frame 3; said frame 6 having opposed openings 6, 6in columns 6, 6 through which passes a lever 7 which is pivoted as at 7to column 6 opposite one of the openings, such as 6. A link 8 connectsthe outer adjacent ends of rods 4 and 7, as shown. On the opposite-endof lever 7 from link 8 is an ad ustable weight 7 for the purposehereinafter set forth.

Mounted above the chamber 6 is a diaphragm casing 9 in. which is mounteda diaphragm 9; said diaphragm 9 being connects ed by a link 9 with thelever 7 adjacent the pivot point 7 of said lever. The diaphragmcasing 9above the diaphragm 9 is connected by a pipe 9 with the supply pipe S,whereby the pressure above the diaphragm 9 will correspond with that insupply pipe S.

By the above arrangement, the diaphragms 5 and 9 are connected withpivoted levers 4 and 7 respectively on the same side of the pivot points4 and 7 of said levers; and the adjacent ends of levers 4 and 7 arefurth'er connected together by link 8. Hence, the pressure abovediaphragm 9 will oppose that below diaphragm 5 and any change inpressure on either diaphragm will result in a shifting of lever 4 and ofthe valve stem 2. Weight 7 may be adjusted to just compensate for theweight of valve 2, 2", or may 100 be set to produce a constant fixeddifierence in pressure ratio.

The ratio between the area of the diaphragm 9 and the area of thediaphragm 5 determines the ratio between the supply and dischargepressures. The weight 7 on lever-7 affords a means of introducing aconstant fixed difference between the discharge pressure obtained andthat which would ex- 1st of no weight were used. Hence the dis-- chargepressure will always hear a predetermined ratio to the supplypressure,thereby permitting the operator to control the dischargepressure by regulating the supply pressure in pipe S.

One important application contemplated for my inventionis its use inheating-sysat high pressure and to use it at low pressure, my valveaflording a means for .varying the discharge pressure by controlling thepressure in the transmission piping.

I do not-limit my invention 'to the exact details as shown in. thedrawing, for obviously changes may be made therein within the scope ofthe claims.

I claim:

1. In a pipeline, a valve, a pair of noncommunicating diaphragmchambers, a pipe connection between the chamber of one of saiddiaphragms and the inlet of the valve; a second pipe connection betweenthe chamber of the other diaphragm and the outlet of the valve; a pairof pivoted levers operatively connected with the respective diaphragmsand adapted to be moved in opposite directions thereby; and a linkconnecting the adjacent ends of said levers; one of said levers beingconnected with the valve stem.

2. In a pipe line, a valve, a pair of diaphragms, one of said diaphragmsbeing connected to operate by the inlet pressure of the valve, and theother to operate by the outlet pressure thereof; a pair of parallelpivoted levers operatively connected with the respective diaphragms andadapted to be moved in opposite directions thereby; and a linkconnecting the adjacent ends of said .levers; one of said levers beingconnected with the valve stem. tems where it is desired to transmit st'eam 3. In a pipe line, a valve provided with a stem, a pair ofdiaphragms, means for imposing the valve inlet pressure on onediaphragm; means for imposing the valve outlet pressure on the otherdiaphragm; a pair of parallel pivoted levers op ratively connected withthe respective diaphragms; one of said levers being connected with thevalve stem; a link connecting the levers whereby the inlet pressurediaphragm will tend to open the valve and the outlet pressure diaphragmto close the valve; and an adjustable Weight on the other lever.

4. In a pipe line, a valve, a pair of opposed diaphragms, means forimposing the valve inlet pressure on one diaphragm; means for imposingthe valve outlet pressure on the other diaphragm; a pairof parallelpivoted levers operatively connected with the respective diaphragms andadapted to be moved in opposite directions thereby; a link connectingthe adjacent ends of said levers; one of said levers being connectedwith the valve stem; and an adjustable Weight on the other lever.

In testimony that I claim the foregoing as my own, I afii x mysignature.

BENJAMIN FRANKLIN GAINES.

